Which of the following statements are true/false?
I. Cell aggregate body plan is found in phylum-Platyhelminthes.
II. Radial symmetry is the most common symmetry found in animals.
III. Pseudocoelom is only found in phylum-Aschelminthes.
IV. All triploblastic animals have a true coelom.
V. Haemocoel is sometimes pbserved in animals belonging to phylum-Platyhelminthes.
Important Questions on Human Reproduction
Which of the following phyla possess body cavity as shown in the diagram below?
Match the following:
| List I | List II | ||
| A | Totipotent cell | I | Haemopoietic stem cells |
| B | Pluripotent cell | II | Muscle stem cell |
| C | Multipotent cell | III | 8 cell stage blastocyst |
| D | Unipotent cell | IV | Inner cell mass |
| V | Mast cell |
| Column-I | Column-II | ||
| P | Mollusca | i | Pseudocoelom |
| Q | Annelida | ii | Radula |
| R | Nematoda | iii | Radial symmetry |
| S | Echinodermata | iv | Segmentation |
Choose the CORRECT combination.
Match the months listed in Column - I write the organogenesis of foetus in Column - II.
| Column - I | Column - II | ||
| (i) | First month | (a) | Separation of eye lids |
| (ii) | Second month | (b) | Hairs on head |
| (iii) | Fifth month | (c) | Heart |
| (iv) | Six month | (d) | limbs and Digits |
Match the following
| List - I | List - II | ||
| (a) | Asymmetry | (i) | Cnidaria |
| (b) | Radial symmetry | (ii) | Platyhelminthes |
| (c) | Bilateral symmetry and Enterocoelom | (iii) | Porifera |
| (d) | Bilateral symmetry without body cavity | (iv) | Hemichordata |
The correct answer is
Match the following columns and select the correct option:-
| Column-I | Column-II | ||
| (a) | Ovary | (i) | Human chorionic gonadotropin |
| (b) | Placenta | (ii) | Estrogen & Progesterone |
| (c) | Corpus luteum | (iii) | Androgens |
| (d) | Leydig cells | (iv) | Progesterone only |
| (I) | Yolk sac placenta |
| (II) | Chorioallantoic placenta |
| (III) | Zonary placenta |
| (IV) | Discoidal placenta |
| (V) | Haemochorial placenta |
| (VI) | Indeciduate placenta |
| (VII) | Deciduate placenta |
Match the following and choose correct combination.
| Column I | Column II | ||
| i) | Cellular grade level | a) | Pheretima |
| ii) | Tissue grade level | b) | Schistosoma |
| iii) | Organ level | c) | Obelia |
| iv) | Organ system level | d) | Sycon |
Consider following features:
- Organ system level of organisation
- Bilateral symmetry
- True coelomates with segmentation of body.
Select the correct option of animal group which possess all the above characteristics:
